How to send receive SOAP request and response using C

Question

private static string WebServiceCall string methodName                WebRequest webRequest   WebRequest Create  http   localhost AccountSvc DataInquiry asmx        HttpWebRequest httpRequest    HttpWebRequest webRequest                   httpRequest Method    POST                    httpRequest ContentType    text xml  charset utf-8       httpRequest Headers Add  SOAPAction  http   tempuri org     methodName       httpRequest ProtocolVersion   HttpVersion Version11      httpRequest Credentials   CredentialCache DefaultCredentials      Stream requestStream   httpRequest GetRequestStream                        Create Stream and Complete Request                  StreamWriter streamWriter   new StreamWriter requestStream  Encoding ASCII        StringBuilder soapRequest   new StringBuilder   lt soap Envelope xmlns xsi   http   www w3 org 2001 XMLSchema-instance          soapRequest Append   xmlns xsd   http   www w3 org 2001 XMLSchema           soapRequest Append  xmlns soap   http   schemas xmlsoap org soap envelope    gt  lt soap Body gt         soapRequest Append   lt GetMyName xmlns   http   tempuri org    gt  lt name gt Sam lt  name gt  lt  GetMyName gt         soapRequest Append   lt  soap Body gt  lt  soap Envelope gt          streamWriter Write soapRequest ToString                      streamWriter Close                        Get the Response         HttpWebResponse wr    HttpWebResponse httpRequest GetResponse        StreamReader srd   new StreamReader wr GetResponseStream          string resulXmlFromWebService   srd ReadToEnd         return resulXmlFromWebService      I tried different code to send receive soap responses but all fail with the same  The remote server returned an error   500  Internal Server Error     I can access the same service using SoapUI  Am able to invoke the method too  I read in this forum that the reason why am I getting 500 error could be wrong header  I verified the header  it seems to be ok  I would appreciate if someone can help   Following is the sample SOAP request   POST  AccountSvc DataInquiry asmx HTTP 1 1 Host  abc def gh com Content-Type  text xml  charset utf-8 Content-Length  length SOAPAction   http   tempuri org GetMyName    lt  xml version  1 0  encoding  utf-8   gt   lt soap Envelope xmlns xsi  http   www w3 org 2001 XMLSchema-instance  xmlns xsd  http   www w3 org 2001 XMLSchema  xmlns soap  http   schemas xmlsoap org soap envelope   gt     lt soap Body gt       lt GetMyName xmlns  http   tempuri org   gt         lt name gt string lt  name gt       lt  GetMyName gt     lt  soap Body gt   lt  soap Envelope gt    I used the above sample request to execute the method and it worked  Here is the Soap request that I passed    lt  xml version  1 0  encoding  utf-8   gt  lt soap Envelope xmlns xsi  http   www w3 org 2001 XMLSchema-instance  xmlns xsd  http   www w3 org 2001 XMLSchema  xmlns soap  http   schemas xmlsoap org soap envelope   gt  lt soap Body gt  lt GetMyName xmlns  http   tempuri org   gt  lt name gt Sam lt  name gt  lt  GetMyName gt  lt  soap Body gt  lt  soap Envelope gt    Edit   I have updated the code above in WebServiceCall that worked for  asmx service  But the same code didn t work for WCF service  Why

User · Accepted Answer

The urls are different    http   localhost AccountSvc DataInquiry asmx   vs     acctinqsvc portfolioinquiry asmx   Resolve this issue first  as if the web server cannot resolve the URL you are attempting to POST to  you won t even begin to process the actions described by your request   You should only need to create the WebRequest to the ASMX root URL  ie  http   localhost AccountSvc DataInquiry asmx  and specify the desired method operation in the SOAPAction header   The SOAPAction header values are different    http   localhost AccountSvc DataInquiry asmx    methodName   vs    http   tempuri org GetMyName    You should be able to determine the correct SOAPAction by going to the correct ASMX URL and appending  wsdl  There should be a  lt soap operation gt  tag underneath the  lt wsdl operation gt  tag that matches the operation you are attempting to execute  which appears to be GetMyName   There is no XML declaration in the request body that includes your SOAP XML    You specify text xml in the ContentType of your HttpRequest and no charset  Perhaps these default to us-ascii  but there s no telling if you aren t specifying them   The SoapUI created XML includes an XML declaration that specifies an encoding of utf-8  which also matches the Content-Type provided to the HTTP request which is  text xml  charset utf-8  Hope that helps

[c#] How to send/receive SOAP request and response using C#?

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